How to use public variables from controller in views in CI 4

Like John_Betong suggested, extend the base controller. What I like to do is something like this:

PHP Code:

class BaseController extends Controller
{
    protected $data = [];

    public function initController(\CodeIgniter\HTTP\RequestInterface $request, \CodeIgniter\HTTP\ResponseInterface $response, \Psr\Log\LoggerInterface $logger)
    {
        parent::initController($request, $response, $logger);

        $this->data['some_data'] = "Something I need for all controllers";
        $this->data['other_data'] = "Some other things..."; 


Then in my controllers I add some other data specific to that controller/method:

PHP Code:

class SomeController extends BaseController
{
    public function index()
    {
        $this->data['another_thing'] = "Something I need just for this method";
        return view('index', $this->data);
    }